What does Krashen's Input Hypothesis state about how language is acquired?

• A. Language is acquired through understanding input that is slightly above the learner's current level (i+1).
• B. Language is acquired only through explicit grammar instruction.
• C. Language is acquired mainly through output practice.
• D. Language is acquired after explicit knowledge about rules is fully learned.

Answer: (A)

Language is built when learners understand messages that are just a bit beyond what they already know. Krashen’s Input Hypothesis says acquisition happens through comprehensible input that is slightly above the learner’s current level (i+1) in meaningful situations. As you listen or read and you can understand the gist plus pick up new structures from context, you internalize grammar and patterns without needing to memorize rules explicitly. The focus is on understanding, not on producing perfect sentences right away. If input is too easy, nothing new is learned; if it’s too hard, comprehension breaks down. So, while explicit instruction or endless output practice can help with learning, they aren’t the primary drivers of acquisition according to this idea.